linux-headers: bump 3.{4, 12, 18}.x series

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/linux-headers/Config.in.host

@@ -211,11 +211,11 @@ endchoice
 config BR2_DEFAULT_KERNEL_HEADERS
 	string
 	default "3.2.79"	if BR2_KERNEL_HEADERS_3_2
-	default "3.4.111"	if BR2_KERNEL_HEADERS_3_4
+	default "3.4.112"	if BR2_KERNEL_HEADERS_3_4
 	default "3.10.101"	if BR2_KERNEL_HEADERS_3_10
-	default "3.12.57"	if BR2_KERNEL_HEADERS_3_12
+	default "3.12.59"	if BR2_KERNEL_HEADERS_3_12
 	default "3.14.67"	if BR2_KERNEL_HEADERS_3_14
-	default "3.18.31"	if BR2_KERNEL_HEADERS_3_18
+	default "3.18.32"	if BR2_KERNEL_HEADERS_3_18
 	default "3.19.8"	if BR2_KERNEL_HEADERS_3_19
 	default "4.0.9"		if BR2_KERNEL_HEADERS_4_0
 	default "4.1.22"	if BR2_KERNEL_HEADERS_4_1